yes Pam the grey squirrel is a larger American, that has almost wiped out our red ones
the reds can be seen in york and of course Scotland
now we are being swamped by the American signal Crayfish they go all the way up to the borders so you will have them in your nearest river Pam, they have wiped out our own smaller crays and are destroying our riverbanks by burrowing in under the bankside